from flask import abort, jsonify
from flask import current_app
from flask import g
from flask import render_template
from flask import request
from flask import session

from info import db
from info.models import News, User, Comment, CommentLike
from info.modules.news import news_blu
from info.utils.captcha.response_code import RET
from info.utils.common import user_login_data


@news_blu.route('/comment_like', methods=["POST"])
@user_login_data
def set_comment_like():
    """评论点赞"""

    if not g.user:
        return jsonify(errno=RET.SESSIONERR, errmsg="用户未登录")

    # 获取参数
    comment_id = request.json.get("comment_id")
    news_id = request.json.get("news_id")
    action = request.json.get("action")

    # 判断参数
    if not all([comment_id, news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ("add", "remove"):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 查询评论数据
    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger(e)
        return jsonify(errno=RET.DBERR, errmsg='查询数据错误')

    if not comment:
        return jsonify(errno=RET.NODATA, errmsg='评论未找到')

    # 点赞
    if action == 'add':
        comment_like = CommentLike.query.filter_by(comment_id=comment_id, user_id=g.user.id).first()
        if not comment_like:
            comment_like = CommentLike()
            comment_like.comment_id = comment_id
            comment_like.user_id = g.user.id
            db.session.add(comment_like)
            comment.like_count += 1

    else:
        comment_like = CommentLike.query.filter_by(comment_id=comment_id, user_id=g.user.id).first()
        if comment_like:
            db.session.delete(comment_like)
            comment.like_count -= 1

    try:
        db.session.commit()
    except Exception as e:
        current_app.logger(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg='操作失败')
    return jsonify(errno=RET.OK, errmsg='OK')


@news_blu.route('/news_comment', methods=['POST'])
@user_login_data
def news_comment():
    """评论新闻"""

    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg='用户未登录')

    news_id = request.json.get('news_id')
    comment_str = request.json.get('comment')
    parent_id = request.json.get('parent_id')

    if not all([news_id, comment_str]):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger(e)
        return jsonify(errno=RET.DBERR, errmsg='查询数据失败')

    if not news:
        return jsonify(errno=RET.NODATA, errmsg='新闻数据不存在')

    # 初始化模型,保存数据
    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_str

    if parent_id:
        comment.parent_id = parent_id

    # 保存到数据库
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger(e)
        return jsonify(errno=RET.DBERR, errmsg='保存评论数据失败')

    return jsonify(errno=RET.OK, errmsg='OK', data=comment.to_dict())


@news_blu.route('/news_collect', methods=['POST'])
@user_login_data
def news_collect():
    """新闻收藏"""
    user = g.user

    news_id = request.json.get('news_id')
    action = request.json.get('action')

    if not user:
        return jsonify(errno=RET.SESSIONERR, errmsg='用户未登录')

    if not news_id:
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    if action not in ('collect', 'cancel_collect'):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger(e)
        return jsonify(errno=RET.DBERR, errmsg='查询数据失败')

    if not news:
        return jsonify(errno=RET.NODATA, errmsg='新闻数据不存在')

    if action == 'collect':
        user.collection_news.append(news)
    else:
        user.collection_news.remove(news)

    return jsonify(errno=RET.OK, errmsg='OK')


@news_blu.route('/<int:news_id>')
@user_login_data
def news_detail(news_id):
    """新闻详情"""
    # 查询用户登陆信息
    user = g.user

    # 右侧新闻排行的逻辑
    news_list = []
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(6)
    except Exception as e:
        current_app.logger.error(e)

    click_news_list = []
    for news in news_list if news_list else []:
        click_news_list.append(news.to_basic_dict())

    # 查询新闻数据
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        abort(404)

    # 更新点击次数
    news.clicks += 1

    # 判断是否收藏该新闻
    is_collected = False

    # 判断该用户是否收藏
    if g.user:
        if news in g.user.collection_news:
            is_collected = True

    # 获取当前新闻评论内容
    comments = []
    try:
        comments = Comment.query.filter(Comment.news_id == news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger(e)

    comment_list = []
    for item in comments:
        comment_dict = item.to_dict()
        comment_list.append(comment_dict)

    # 点赞
    comment_like_ids = []
    if g.user:
        try:
            comment_ids = [comment.id for comment in comments]
            if len(comment_ids) > 0:
                comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),
                                                         CommentLike.user_id == g.user.id).all()

                comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger(e)

    comment_list = []
    for item in comments if comments else []:
        comment_dict = item.to_dict()
        comment_dict['is_like'] = False
        # 判断用户是否点赞该评论
        if g.user and item.id in comment_like_ids:
            comment_dict['is_like'] = True
        comment_list.append(comment_dict)

    data = {
        'user_info': user.to_dict() if user else None,
        'click_news_list': click_news_list,
        'news': news.to_dict(),
        'is_collected': is_collected,
        'comments': comment_list
    }

    return render_template('news/detail.html', data=data)